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    • 5. 发明授权
    • Image processing apparatus and method, and storage medium
    • 图像处理装置和方法以及存储介质
    • US08538091B2
    • 2013-09-17
    • US12147123
    • 2008-06-26
    • Yuji KanedaKatsuhiko MoriHiroshi Sato
    • Yuji KanedaKatsuhiko MoriHiroshi Sato
    • G06K9/00
    • G06K9/00845G06K9/00315G06K9/0061G06K9/4628
    • An image-processing apparatus for executing accurate facial expression recognition even for a subject hard to recognize a facial expression is provided. A person's face region is extracted from an image input from an image input unit. A predetermined partial region that changes between when the facial expression is in the first and second states is extracted from the extracted face region. A facial expression evaluation value is calculated using an evaluation value calculation formula. When the calculated facial expression evaluation value exceeds a threshold value, it is determined that the facial expression is in the second state. If the difference between the maximum value and the minimum value of the calculated facial expression evaluation value within a predetermined time is smaller than a predetermined value, the evaluation value calculation formula or its parameter is changed to increase the difference.
    • 提供了即使对于难以识别面部表情的对象也执行准确的面部表情识别的图像处理装置。 从图像输入单元输入的图像中提取人脸区域。 从所提取的面部区域中提取在面部表情处于第一状态和第二状态之间时的变化的预定部分区域。 使用评价值计算公式计算面部表情评价值。 当所计算的面部表情评估值超过阈值时,确定面部表情处于第二状态。 如果计算出的面部表情评估值的最大值与最小值之间的差在预定时间内小于预定值,则改变评估值计算公式或其参数以增加差异。